Door lock



May 3, 1932. A. DINA 1,856,091

DOOR LOCK Filed July 22, 1930 INVENTOR Huqus'io D "1 ATTORNEYS PatentedMay 3, 1932 UNITED STATES PATENT OFFIOE A'UG'UfiTO DINA,

SECTOR CORPORATION, OF NEW YORK,

DOOR

Application filed July 22,

This invention relates to a closure fastener, and more particularly to adoor lock.

An object of the invention is to provide a lock which is capable ofsecuring the door accurately in a predetermined position.

Another object is to provide a lock which is simple to operate and whichpositively secures the door against displacement when the same is inclosed position.

A further object is to provide a cheap, simple, efficient and convenientdevice of the type above indicated.

The above objects and others which will be apparent as the nature of theinvention is disclosed are accomplished by providing a member carried bythe door which is adapted to maize threaded engagement with a stationarystud for securing the door in closed position.

A special means is provided for centering the member with respect to thestud whereby the door is accurately positioned regardless of thecondition of the cooperating threads.

The invention is particularly applicable to a metal container in whichthe doors when closed form a part of the casing and impart rigiditythereto. For example, a container for a portable projection machine ofthe type disclosed in my copending application Serial No. 132.312. filedMarch 1, 1930, for ventilating and fire shutter for motion pictureprojection machines.

It is obvious, however, that the invention maybe used in various otherinstances where it is desirable to obtain a positive lock for a variableclosure member and to secure an accurate alignment of the parts when themember in closed position.

The invention also consists in certain new and original features ofconstruction and combinations of parts hereinafter set forth andclaimed.

Although the novel features which are believed to be characteristic ofthis invention will be particularly pointed out in the claims appendedhereto, the invention itself, as to its objects and advantages, the modeof its operation and the manner of its organization may be betterunderstood by referring to the following description taken in con- N.Y., A CORPORATION OF DELAWARE LOOK 1930. Serial No. 469,668.

nection with the accompanying drawings forming a part thereof, in whichFigure 1 is a perspective View of a container showing the locks appliedthereto;

Figure 2 is a section taken on the line 2'2 of Figure 1 showing the lockin engaged position;

Figure 3 is a similar section showing the lock disengaged;

Figure 4 is a rear elevation of the lock housing; and

Figure 5 is a perspective of the key used in conjunction with the lock.

Like reference characters denote like parts in the several figures ofthe drawings.

In the following description and in the claims parts will be identifiedby specific names for convenience, but they are intended to be asgeneric in their application to similar parts as the art will permit.

Referring to the drawings more in detail the invention is shown appliedto a cabinet having sides 10 and doors or closure members 11 and 12 towhich strips 13 and 14 respectively are secured. Said strips are adaptedto engage the opposite door when the members are in closed position forsecuring; the same against displacement. For locking the doors a pair oflocks 15 and 16 are provided which are associated with doors 11 and 12re spectively at a point near strips 13 and 14. Said locks are adaptedto engage a stationary portion of side members 10 and to positively holdthe doors in predetermined position in a manner to be pointed out.

Each of said locks comprise a member 17 which is journalled in bushing18 carried in a suitable housing 20 formed in a door 1.1. Said member 17is provided with a circumferential groove 21 in which a key 22 isseated. Said irev and groove permit a predetermined longitudinalmovement of member 17 with respect to bushing 18 and also permit freerotational movement of member 7 7. Bushing 18 may be secured in a housng 20 by set screw 23. Member 17 is provided at its outer end with ahandle 24 which may have its edge knurled or otherwise formed to providea gripping surface. The inner end of member 17 is drilled and threaded,as by 013 ELIZABETH, NEW JERSEY, ASSIGNOR T0 INTER-NATIONAL PRO- jthreads 25, to receive a cooperating member to be described. Door 11 maybe recessed as at 26 to permit handle 24 to normally lie within theplane of said door when the members are in looking position.

The stationary portion of the lock' comprisesa base plate 30 having apair'of e2 tensions 31 by which it is secured to the housing 32forn1inga part of side member, 10. Said base platecarries astud 33 which isprovided at its end with suitable threads to cooperate with threads 25of member 17. Said stud is also tapered as at 35 to assist in securingthe proper alignment between member 17 and stud 33 when said members arebrought into engagement. A stationary sleeve-36 is carried by basemember 30 and is provided with a shoulder 37 against which a:cooperating shoulder on a movable sleeve 38 restsfor limiting themovement of said movable sleeve. Sleeve 38 is provided with aninternaltaper 39 which cooperates with a corresponding taper 40 formed on theouter surface of member 17 Sleeve 38 is normallyheld in an advancedposition by spring 41 which seats in a suitable recess l2 in said sleeveand maintains the cooperating shoulders on sleeves 36 and 38 in contact.A comparatively small amount of'longitudinal movement is permitted insleeve 38in response to pressure of tapered surfaces 39 and 40 when thelock is brought into engaged position.

It will be noted that when the door is in open position member-17 isloosely carried in bushing 19 and is free to'move longitudinally adistance determined by the key22 and cooperating-slot 21. lVhen thedoor'is brought into closed position the threads 25 of member 17 contactwith'tapered end 35 of stud 33 and are brought thereby into engagementwith the threaded end of'said stud. When member 17 isthreaded onto stud33, as by turning handle 24, tapered surfaces 39 and 40 are brought intoengagement and serve to positively align the axes of members 17 and 33.Further turning of'handle 24 compresses spring-A1 and permits thed'oor11 to be drawn tightly against side 10. In this position the members areheld securely-in closed position y means of the cooperating; screwthreads on members 17 and 33. Said members are also held againsttransverse displacement by the cooperating surfaces 39 and 40.

Itwill be noted that the closing of the lock is facilitated by thetapered end 35 on stud 33 which assists in properly aligning thememhers-when the door is closed. Furthermore, after the membersarebrought into engage ment the tapered sleeve 38 secures them againsttransverse movement ant accurately maintains the members in theirrespective positions. This feature is particularly important in casecertain apparatus is carried by the door which must be brought into anexact position with respect to other apparatus carried by the stationaryhousing or stud members 10. Furthermore, sufficient rigidity is impartedto the housing by the above de scribed lock to materially strengthen theassembly and in the case of the projection machine described in mycopending: application above referred to imparts suffici'ent' rigidityto permit transportation from place to place.

l/Vhile certain novel features of the invention. have been shown anddescribed and are pointed out in the annexed claims, it will beunderstood that various omissions, substitutions and changes in theforms and details of the device-illustrated and in its operation may bemade by those skilled in the art With- 80 out departing from the spiritof the-invention.

What'is claimed is 1. A closure fastener comprising a. r0:-

tatable member carried byone elementof'said 135 closure and movablelongitudinallyw-ith respect thereto, said member being provided with aninternal screw thread,.a.stationary stud carried by anotherelementoftsaid: closure and being threaded to cooperate with saidinternal threads, said stud having; atapered end adapted to engage saidinternal threads for directing said members'intoaxial alignment.

2. A closure fastener'comprising apair of associated with the other ofsaid elements for P securing said elementsin axial alignment- 3. Aclosure fastener comprising a pair. of threaded members adapted to bepositioned in axial alignment. one ofsaid members-having a taperedsurface and a movable'sleeve having a complementary tapered surfaceassociated. with the other of said elements-for securing said elementsin axial alignment, said sleeve being resiliently movable in response toaxial pressure betweensaid tapered surfaces;

4. A look having a closure membercomprising a stationary stud having athreaded end, a sleeve surrounding the threaded end of said stud, acomplementary member hav- T ing an internal thread adapted toengageesaid studand an external tapered surface adapted to engage saidsleeve, said complementary member being carried by one element of'saidclosure and said stationary stud and; sleeve being carried by anotherelementtliereof. said members being adapted to maintain said elementsinfixed' relative position;

5. In a mechanism having a stationary housing and a movable door, a doorlock comprisinga threaded stud mounted in sai'dhousing, a sleevesurrounding said'stud and l'ongitudinally movable with respect thereto,a rotatable member carried by said door'and internally threaded toengage said'stud,said

member having a tapered surface to engage said sleeve for preventingtransverse displacement, said stud having a tapered end for directingsaid members into axial alignment, and resilent means for normallyholding said sleeve in engagement with said member.

6. A look comprising a pair of cooperating threaded members adapted tobe maintained in axial alignment, one of said members hav- :ing atapered end to facilitate engagement therebetween, and means forpreventing transverse displacement of said members comprisingcooperating tapered surfaces brought into engagement when said membersare in closed position and resilient means for normally maintaining saidsurfaces in engagement.

7. A look comprising a stationary stud having a threaded end, a movablemember threaded to engage said stud, said movable member having atapered surface, a sleeve surrounding said stud and mounted concentrictherewith and having a surface compleae mentary to said tapered surface,and means for bringing said sleeve and said surface into engagement whensaid members are fully engaged whereby transverse stress is transferredfrom the cooperating threads to said sleeve and said members are held inaxi al alignment thereby.

8. A lock comprising a stationary stud having a threaded end, a movablemember threaded to engage said stud, said movable member having atapered surface, a sleeve surrounding said stud and having a surfacecomplementary to said tapered surface and adapted to engage the same,and means for resiliently holding said sleeve in engagement 4U with saidtapered surface whereby transverse stress is transferred to said sleeveand carried thereby.

In testimony whereof I have hereunto set my hand. as AUGUSTO DINA.

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